Add function prototypes for combat, updating position and movement

src/unit.cpp

 #include "unit.hpp"
 
-Unit::Unit(int x, int y): x(x), y(y) {};
+Unit::Unit(std::string name, int health, int speed, int attack, std::pair<int, int> range, MovementType movement, WeaponType weapon)
+    : name(std::move(name)), health(health), speed(speed), attack(attack), range(range), movement(movement), weapon(weapon) {}
+
+
+//TODO: IF necessary, implement scaling attack by remaining health
+void Unit::init_combat(Unit defender)
+{
+    //Attacker gets first move, inflicts its damage upon the the defender
+    defender.setHealth(defender.getHealth() - this.getAttack());
+
+    //if defender survives, it gets to inflict its damage upon the attacker
+    if(defender.getHealth() > 0) {
+        this.setHealth(this.getHealth() - defender.getAttack());
+    } else { //if ded, defender gets deleted
+        defender.~Unit();
+    }
+}
+
+void Unit::update_position(int posX, int posY)
+{
+    this.setX(posX);
+    this.setY(posY);
+}

src/unit.hpp

@@ -90,6 +90,27 @@ private:
         {{MovementType::SHIPENGINE, TerrainType::STREET}, 999},
         {{MovementType::SHIPENGINE, TerrainType::WATER}, 1}      
     };
+    
+    /*
+    The attacker will move towards the defender and thus initiate combat
+    @params Takes a reference to the defender
+
+    Will Update the health for both units
+    Attacker deals damage to the defender first
+    */
+    void init_combat(Unit defender); 
+
+    /*
+    @params Takes the desired position of the unit and updates its values
+    */
+    void update_position(int posX, int posY);
+
+    /*
+    This function needs to be able to determine the possible movement-paths the unit can take
+    MUST take into consideration that different units behave differently on certain terrain
+    MUST show all movements possible
+    */
+    void calculate_movement();
 };
 
 #endif // UNIT_HPP
\ No newline at end of file